[sugar] Presence service issue

[Marco Pesenti Gritti]

Hi Dan,

sometimes the activities are published without the icon color property. 
I only reproduced one time on my laptop but I can reproduce reliably on 
the olpc and on another laptop.
On the olpc I'm using 81 with the new matchbox, sugar, goocanvas, 
pygoocanvas, olpc-artwork packages that I built yesterday night.
Any idea?

Thanks,
Marco